Hi there, I've been a bit stuck on this for a while now, trying out different transformers, but think i've finally hit the wall. To sum up what I'm trying to do:

Read in a point shape file, a 5m grid of points in a 5km square area. Each point has a type associated with it, which is just a number between 1 and 25.

Extract the coordinates, create the vertices, and then use the Numeric Rasterizer.

Read in my RGB24 Palette from a text file, and match the rgb colour to the right class.

Use interpretation coercers, palette adders, resolvers, generators etc to get to a Uint16 output.

Write out to MapInfo Vertical Mapper nGRID format. Due to it having a palette, the raster will generate a .grc output, instead of a .grd output.

This generates the .grc output, and the colours have all been applied correctly. The only things is that when interrogating the output in MapInfo, the Class Name is blank. I'd assumed that since the type carried through into the rasterization to allow the palette to be applied, the type would carry through into the output and would allow the user to see what each colour represented. Not sure if I need to add another transformer to pull out this value? I'd tried using a group by on the type filed in the Numeric Rasterizer transformer, but this led me to having a grc file for each type.

I've used and read through a couple of the FME blog posts on raster and palette manipulation, and it got me most of the way there, I think its just where this MapInfo output needs a very specific use of the transformers that has me totally stuck!